Inter-m IMX-824, Service Manual

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CN1 Signal I/O
Pin Signal Remarks
1 n.c.
2 n.c.
3 Audio GND
4 Audio GND
5 Signal Input R-
6 Signal Input R+
7 Audio GND
8 Audio GND
9 Signal Input L-
10 Signal Input L+
CN2 BUS I/O
Pin Signal Remarks Pin Signal Remarks
1 MUTE group 4 5V 2 MUTE group 3 5V
3 MUTE group 2 5V 4 MUTE group 1 5V
5 I/P SOLO status Active=0V 6 n.c.
7 AFL cont. Active=0V 8 n.c.
9 n.c. 10 n.c.
11 n.c. 12 n.c.
13 SOLO R bus 14 n.c.
15 SOLO L bus 16 Sub-GRP8 bus
17 Sub-GRP7 bus 18 Sub-GRP6 bus
19 Sub-GRP5 bus 20 Sub-GRP4 bus
21 Sub-GRP3 bus 22 Sub-GRP2 bus
23 Sub-GRP1 bus 24 Mix bus common
25 MIX C bus 26 0V ref
27 MIX R bus 28 0V ref
29 MIX L bus 30 -18V
31 AUX8 bus 32 -18V
33 AUX7 bus 34 -18V
35 AUX6 bus 36 0V
37 AUX5 bus 38 0V
39 AUX4 bus 40 0V
41 AUX3 bus 42 +18V
43 AUX2 bus 44 +18V
45 AUX1 bus 46 +18V
47 n.c. 48 n.c.
49 n.c. 50 n.c.
CN3 Left Fader I/O
Pin Signal Remarks
1 Bottom Audio GND
2 Wiper signal out
3 Top signal in
CN4 Right Fader I/O
Pin Signal Remarks
1 Bottom Audio GND
2 Wiper signal out
3 Top signal in
CN5 Off set test point
Pin Signal Remarks
1 Phantom 0V Output current return
2 n.c.
3 Audio GND DC 0V
1)Off set minimizing
This alignment minimizes DC off set voltage of “phantom 0V” on each input PCB.
TEST POINT CN4 (pin1 and pin3)
ADJUST POINT SVR1
CONDITION without any inputs
Adjust semi-volume to minimize DC voltage difference (/- 1mV) between pin1 and pin3 of test point connect